Want to upgrade to Gigablast and currently have a Docsis 3.0 modem. Sales tells me I have to use their modem and installation because I'm in a fiber area - sounds fishy. If I purchase a Cox certifie...
"Fishy" is a strong word. Sales probably has a "schematic" of the Cox infrastructure in your neighborhood. If Cox can wire your house with fiber-optic cable, you'll need to use their Optical Network Termination device (ONT). Fiber-optic cable can not terminate at a DOCSIS. DOCSIS is for coaxial cable.
However, although there may be fiber in your neighborhood but Cox can't wire it to your house, townhouse or condo; you can buy your own DOCSIS because your house will still have a coaxial connection.
The question is: Will Cox directly connect fiber-optic cable to your house? You could probably ask a neighbor with Cox gigabit service. You could also just wait for a tech and when it comes time to install a DOCSIS...if you still needed one...tell the tech to keep the device because you'll buy your own.
Another question: Will you subscribe to Cox Voice (landline)?